Jillette followed a vegan-style, 1,000-calorie-a-day diet from December 2014 and April 2015, as Celebrity Health Fitness has reported.

The 6-foot-6 Penn shed 120 pounds in 120 days without exercise, dropping from 330 pounds to 210 pounds, and lost over 10 inches off his waist.

As a result of his incredible weight loss, Jillette no longer needs to take drugs for his high blood pressure. “I was on six very powerful meds to bring the blood pressure down,” said Penn, 60.

The 6-foot-6 Penn Jillette slimmed down from 330 pounds to 210 pounds and lost 10 inches off his waist in 100 days. (Photos: Instagram)

“My doctor said I needed to get my weight down, and if I brought it down 30 or 40 pounds it would be a little easier to control. And then he said something in passing that completely blew my mind. He said, ‘If you got down to 230, you probably wouldn’t need any of the meds.”

On his mostly vegan diet, Jillette lost almost a pound a day without exercise.

Dr. Neal Barnard agrees. “Studies suggest that free radicals [toxic molecules that form in the body] contribute to aging,” said Barnard, author of 21-Day Weight Loss Kickstart. “A vegan diet, rich in fruits and vegetables, is full of antioxidants which help protect the body from damage by free radicals.”